/*!
 * Bootstrap's Gruntfile
 * https://getbootstrap.com/
 * Copyright 2013-2019 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 */

module.exports = function (grunt) {
    'use strict';

    // Force use of Unix newlines
    grunt.util.linefeed = '\n';

    RegExp.quote = function (string) {
        return string.replace(/[-\\^$*+?.()|[\]{}]/g, '\\$&');
    };

    var fs = require('fs');
    var path = require('path');
    var generateGlyphiconsData = require('./grunt/bs-glyphicons-data-generator.js');
    var BsLessdocParser = require('./grunt/bs-lessdoc-parser.js');
    var getLessVarsData = function () {
        var filePath = path.join(__dirname, 'less/variables.less');
        var fileContent = fs.readFileSync(filePath, {encoding: 'utf8'});
        var parser = new BsLessdocParser(fileContent);
        return {sections: parser.parseFile()};
    };
    var generateRawFiles = require('./grunt/bs-raw-files-generator.js');
    var generateCommonJSModule = require('./grunt/bs-commonjs-generator.js');
    var configBridge = grunt.file.readJSON('./grunt/configBridge.json', {encoding: 'utf8'});

    Object.keys(configBridge.paths).forEach(function (key) {
        configBridge.paths[key].forEach(function (val, i, arr) {
            arr[i] = path.join('./docs/assets', val);
        });
    });

    // Project configuration.
    grunt.initConfig({

        // Metadata.
        pkg: grunt.file.readJSON('package.json'),
        banner: '/*!\n' +
            ' * Bootstrap v<%= pkg.version %> (<%= pkg.homepage %>)\n' +
            ' * Copyright 2011-<%= grunt.template.today("yyyy") %> <%= pkg.author %>\n' +
            ' * Licensed under the <%= pkg.license %> license\n' +
            ' */\n',
        jqueryCheck: configBridge.config.jqueryCheck.join('\n'),
        jqueryVersionCheck: configBridge.config.jqueryVersionCheck.join('\n'),

        // Task configuration.
        clean: {
            dist: 'dist',
            docs: 'docs/dist'
        },

        jshint: {
            options: {
                jshintrc: 'js/.jshintrc'
            },
            grunt: {
                options: {
                    jshintrc: 'grunt/.jshintrc'
                },
                src: ['Gruntfile.js', 'package.js', 'grunt/*.js']
            },
            core: {
                src: 'js/*.js'
            },
            test: {
                options: {
                    jshintrc: 'js/tests/unit/.jshintrc'
                },
                src: 'js/tests/unit/*.js'
            },
            assets: {
                src: ['docs/assets/js/src/*.js', 'docs/assets/js/*.js', '!docs/assets/js/*.min.js']
            }
        },

        jscs: {
            options: {
                config: 'js/.jscsrc'
            },
            grunt: {
                src: '<%= jshint.grunt.src %>'
            },
            core: {
                src: '<%= jshint.core.src %>'
            },
            test: {
                src: '<%= jshint.test.src %>'
            },
            assets: {
                options: {
                    requireCamelCaseOrUpperCaseIdentifiers: null
                },
                src: '<%= jshint.assets.src %>'
            }
        },

        concat: {
            options: {
                banner: '<%= banner %>\n<%= jqueryCheck %>\n<%= jqueryVersionCheck %>',
                stripBanners: false
            },
            core: {
                src: [
                    'js/transition.js',
                    'js/alert.js',
                    'js/button.js',
                    'js/carousel.js',
                    'js/collapse.js',
                    'js/dropdown.js',
                    'js/modal.js',
                    'js/tooltip.js',
                    'js/popover.js',
                    'js/scrollspy.js',
                    'js/tab.js',
                    'js/affix.js'
                ],
                dest: 'dist/js/<%= pkg.name %>.js'
            }
        },

        uglify: {
            options: {
                compress: true,
                mangle: true,
                ie8: true,
                output: {
                    comments: /^!|@preserve|@license|@cc_on/i
                }
            },
            core: {
                src: '<%= concat.core.dest %>',
                dest: 'dist/js/<%= pkg.name %>.min.js'
            },
            customize: {
                src: configBridge.paths.customizerJs,
                dest: 'docs/assets/js/customize.min.js'
            },
            docs: {
                src: configBridge.paths.docsJs,
                dest: 'docs/assets/js/docs.min.js'
            }
        },

        less: {
            options: {
                ieCompat: true,
                strictMath: true,
                sourceMap: true,
                outputSourceFiles: true
            },
            core: {
                options: {
                    sourceMapURL: '<%= pkg.name %>.css.map',
                    sourceMapFilename: 'dist/css/<%= pkg.name %>.css.map'
                },
                src: 'less/bootstrap.less',
                dest: 'dist/css/<%= pkg.name %>.css'
            },
            theme: {
                options: {
                    sourceMapURL: '<%= pkg.name %>-theme.css.map',
                    sourceMapFilename: 'dist/css/<%= pkg.name %>-theme.css.map'
                },
                src: 'less/theme.less',
                dest: 'dist/css/<%= pkg.name %>-theme.css'
            },
            docs: {
                options: {
                    sourceMapURL: 'docs.css.map',
                    sourceMapFilename: 'docs/assets/css/docs.css.map'
                },
                src: 'docs/assets/less/docs.less',
                dest: 'docs/assets/css/docs.css'
            },
            docsIe: {
                options: {
                    sourceMap: false
                },
                src: 'docs/assets/less/ie10-viewport-bug-workaround.less',
                dest: 'docs/assets/css/ie10-viewport-bug-workaround.css'
            }
        },

        postcss: {
            options: {
                map: {
                    inline: false,
                    sourcesContent: true
                },
                processors: [
                    require('autoprefixer')(configBridge.config.autoprefixer)
                ]
            },
            core: {
                src: 'dist/css/<%= pkg.name %>.css'
            },
            theme: {
                src: 'dist/css/<%= pkg.name %>-theme.css'
            },
            docs: {
                src: 'docs/assets/css/docs.css'
            },
            examples: {
                options: {
                    map: false
                },
                expand: true,
                cwd: 'docs/examples/',
                src: ['**/*.css'],
                dest: 'docs/examples/'
            }
        },

        stylelint: {
            options: {
                configFile: 'grunt/.stylelintrc',
                reportNeedlessDisables: false
            },
            dist: [
                'less/**/*.less'
            ],
            docs: [
                'docs/assets/less/**/*.less'
            ],
            examples: [
                'docs/examples/**/*.css'
            ]
        },

        cssmin: {
            options: {
                compatibility: 'ie8',
                sourceMap: true,
                sourceMapInlineSources: true,
                level: {
                    1: {
                        specialComments: 'all'
                    }
                }
            },
            core: {
                src: 'dist/css/<%= pkg.name %>.css',
                dest: 'dist/css/<%= pkg.name %>.min.css'
            },
            theme: {
                src: 'dist/css/<%= pkg.name %>-theme.css',
                dest: 'dist/css/<%= pkg.name %>-theme.min.css'
            },
            docs: {
                src: 'docs/assets/css/docs.css',
                dest: 'docs/assets/css/docs.min.css'
            }
        },

        copy: {
            fonts: {
                expand: true,
                src: 'fonts/**',
                dest: 'dist/'
            },
            docs: {
                expand: true,
                cwd: 'dist/',
                src: [
                    '**/*'
                ],
                dest: 'docs/dist/'
            }
        },

        connect: {
            server: {
                options: {
                    port: 3000,
                    base: '.'
                }
            }
        },

        jekyll: {
            options: {
                bundleExec: true,
                config: '_config.yml',
                incremental: false
            },
            docs: {},
            github: {
                options: {
                    raw: 'github: true'
                }
            }
        },

        pug: {
            options: {
                pretty: true,
                data: getLessVarsData
            },
            customizerVars: {
                src: 'docs/_pug/customizer-variables.pug',
                dest: 'docs/_includes/customizer-variables.html'
            },
            customizerNav: {
                src: 'docs/_pug/customizer-nav.pug',
                dest: 'docs/_includes/nav/customize.html'
            }
        },

        htmllint: {
            options: {
                ignore: [
                    'Element "img" is missing required attribute "src".'
                ],
                noLangDetect: true
            },
            src: ['_gh_pages/**/*.html', 'js/tests/**/*.html']
        },

        watch: {
            src: {
                files: '<%= jshint.core.src %>',
                tasks: ['jshint:core', 'exec:karma', 'concat']
            },
            test: {
                files: '<%= jshint.test.src %>',
                tasks: ['jshint:test', 'exec:karma']
            },
            less: {
                files: 'less/**/*.less',
                tasks: ['less', 'copy']
            },
            docs: {
                files: 'docs/assets/less/**/*.less',
                tasks: ['less']
            }
        },

        exec: {
            browserstack: {
                command: 'cross-env BROWSER=true karma start grunt/karma.conf.js'
            },
            karma: {
                command: 'karma start grunt/karma.conf.js'
            }
        }
    });


    // These plugins provide necessary tasks.
    require('load-grunt-tasks')(grunt, {scope: 'devDependencies'});
    require('time-grunt')(grunt);

    // Docs HTML validation task
    grunt.registerTask('validate-html', ['jekyll:docs', 'htmllint']);

    var runSubset = function (subset) {
        return !process.env.TWBS_TEST || process.env.TWBS_TEST === subset;
    };
    var isUndefOrNonZero = function (val) {
        return typeof val === 'undefined' || val !== '0';
    };

    // Test task.
    var testSubtasks = [];
    // Skip core tests if running a different subset of the test suite
    if (runSubset('core')) {
        testSubtasks = testSubtasks.concat(['dist-css', 'dist-js', 'stylelint:dist', 'test-js', 'docs']);
    }
    // Skip HTML validation if running a different subset of the test suite
    if (runSubset('validate-html') &&
        // Skip HTML5 validator on Travis when [skip validator] is in the commit message
        isUndefOrNonZero(process.env.TWBS_DO_VALIDATOR)) {
        testSubtasks.push('validate-html');
    }
    // Only run BrowserStack tests if there's a BrowserStack access key
    if (typeof process.env.BROWSER_STACK_USERNAME !== 'undefined' &&
        // Skip BrowserStack if running a different subset of the test suite
        runSubset('browserstack') &&
        // Skip BrowserStack on Travis when [skip browserstack] is in the commit message
        isUndefOrNonZero(process.env.TWBS_DO_BROWSERSTACK)) {
        testSubtasks.push('exec:browserstack');
    }

    grunt.registerTask('test', testSubtasks);
    grunt.registerTask('test-js', ['jshint:core', 'jshint:test', 'jshint:grunt', 'jscs:core', 'jscs:test', 'jscs:grunt', 'exec:karma']);

    // JS distribution task.
    grunt.registerTask('dist-js', ['concat', 'uglify:core', 'commonjs']);

    // CSS distribution task.
    grunt.registerTask('dist-css', ['less:core', 'less:theme', 'postcss:core', 'postcss:theme', 'cssmin:core', 'cssmin:theme']);

    // Full distribution task.
    grunt.registerTask('dist', ['clean:dist', 'dist-css', 'copy:fonts', 'dist-js']);

    // Default task.
    grunt.registerTask('default', ['clean:dist', 'copy:fonts', 'test']);

    grunt.registerTask('build-glyphicons-data', function () {
        generateGlyphiconsData.call(this, grunt);
    });

    // task for building customizer
    grunt.registerTask('build-customizer', ['build-customizer-html', 'build-raw-files']);
    grunt.registerTask('build-customizer-html', 'pug');
    grunt.registerTask('build-raw-files', 'Add scripts/less files to customizer.', function () {
        var banner = grunt.template.process('<%= banner %>');
        generateRawFiles(grunt, banner);
    });

    grunt.registerTask('commonjs', 'Generate CommonJS entrypoint module in dist dir.', function () {
        var srcFiles = grunt.config.get('concat.core.src');
        var destFilepath = 'dist/js/npm.js';
        generateCommonJSModule(grunt, srcFiles, destFilepath);
    });

    // Docs task.
    grunt.registerTask('docs-css', ['less:docs', 'less:docsIe', 'postcss:docs', 'postcss:examples', 'cssmin:docs']);
    grunt.registerTask('lint-docs-css', ['stylelint:docs', 'stylelint:examples']);
    grunt.registerTask('docs-js', ['uglify:docs', 'uglify:customize']);
    grunt.registerTask('lint-docs-js', ['jshint:assets', 'jscs:assets']);
    grunt.registerTask('docs', ['docs-css', 'lint-docs-css', 'docs-js', 'lint-docs-js', 'clean:docs', 'copy:docs', 'build-glyphicons-data', 'build-customizer']);

    grunt.registerTask('prep-release', ['dist', 'docs', 'jekyll:github']);
};
